Alert archive / Iowa / Severe Thunderstorm Warnings in 1990
Severe Thunderstorm Warning 3, NWS Des Moines, IA
NWS Des Moines, IA issued this severe thunderstorm warning at Mar 10, 1990, 7:45 AM CST for Mahaska County, Poweshiek County, Iowa. It was in force for 30 min. 1 report came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- Mar 10, 1990, 7:45 AM CST (13:45 UTC)
- Expired
- Mar 10, 1990, 8:15 AM CST
- In force
- 30 min
- Issued by
- NWS Des Moines, IA
- Area
- Whole counties
Counties Mahaska County, IA, Poweshiek County, IA
The radar
The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Mar 10, 8:00 AM CST | Hail 0.88 | Mahaska, IA |
NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in. Storm Data before 1996 records only tornadoes, thunderstorm wind and hail.
The nearest sounding before it
Omaha, NE (KOAX), launched 12:00Z, 1.8 hours before the alert went out and 316 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 3580 m above ground
- 0-6 km bulk shear
- 46 kt
- 0-1 km storm-relative helicity
- 186 m²/s²
- 0-3 km storm-relative helicity
- 133 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000
TTAA00 KDSM 101345
SVRDSM
IAC157-123-101415-
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE DES MOINES IA
745 AM CST SAT MAR 10 1990
THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM
WARNING EFFECTIVE UNTIL 815 AM CST FOR PEOPLE IN THE FOLLOWING
COUNTIES
IN THE CENTRAL PART OF IOWA
SOUTHERN POWESHIEK...
IN THE SOUTH CENTRAL PART OF IOWA
NORTHERN MAHASKA...
AT 740 AM CST...WEATHER RADAR IN DES MOINES INDICATED A SEVERE
THUNDERSTORM OVER EXTREME NORTHWEST MAHASKA COUNTY...ABOUT 40
MILES EAST OF DES MOINES.
THE STORM WAS MOVING EAST AT 30 TO 35 MILES AN HOUR...AND WILL
MOVE INTO THE NEW SHARON AND MONTEZUMA AREA BY AROUND 800 AM
THIS MORNING.
THIS STORM PRODUCED 1 INCH DIAMETER HAIL AS IT MOVED THROUGH
PELLA AT 715 AM.
REMEMBER...SEVERE THUNDERSTORMS PRODUCE WINDS IN EXCESS OF 60 MILES
AN HOUR...LARGE HAIL...DANGEROUS LIGHTNING...AND VERY HEAVY RAINS.
FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR
OF YOU HOME OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DO NOT
DRIVE INTO AREAS WHERE WATER COVERS THE ROAD.
SCHUMACHERWhat forecasters said that day
The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
In the hours before
Special weather statement, Mar 10, 1:48 AM CST, 5 hours 57 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY...CORRECTED...MOVEMENT NATIONAL WEATHER SERVICE DES MOINES IA 140 AM CST SAT MAR 10 1990 AT 130 AM...VERY STRONG THUNDERSTORMS WERE LOCATED IN EASTERN IOWA. THE STRONGEST STORM WAS LOCATED 20 MILES NORTHWEST OF BURLINGTON. ANOTHER VERY STRONG STORM WAS IN SOUTHERN CEDAR COUNTY...30 MILES NORTHWEST OF DAVENPORT. BRIEF HEAVY RAINFALL AND POSSIBLY SMALL HAIL CAN BE EXPECTED WITH THE THUNDERSTORMS. OTHER THUNDERSTORMS WERE IN EASTERN NEBRASKA AND SHOULD MOVE INTO THE EXTREME WESTERN PART OF IOWA BY AROUND 3AM. THE THUNDERSTORMS WERE MOVING EAST AT ABOUT 30 MPH. HUTTON
Special weather statement, Mar 10, 5:27 AM CST, 2 hours 18 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DES MOINES IA 520 AM CST SAT MAR 10 1990 ...THUNDERSTORMS MOVE INTO THE DES MOINES METRO AREA... THUNDERSTORMS WERE MOVING INTO POLK COUNTY FROM THE WEST. REPORTS INDICATED VERY HEAVY RAIN WAS ACCOMPANYING THE STORM. ALSO HAIL UP TO MARBLE-SIZED HAS BEEN REPORTED NEAR DE SOTO IOWA...SOME 20 MILES WEST OF DES MOINES...HOWEVER MOST OF THE HAIL WAS PEA-SIZED. NO EXCESSIVE WINDS HAVE BEEN REPORTED WITH THIS STORM. THE STORM WAS MOVING 30 TO 35 MILES AN HOUR SHOULD BE THROUGH THE DES MOINES METRO AREA BETWEEN 630 AND 700 AM CST. FORSTER
Special weather statement, Mar 10, 5:35 AM CST, 2 hours 10 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DES MOINES IA 520 AM CST SAT MAR 10 1990 ...THUNDERSTORMS MOVE INTO THE DES MOINES METRO AREA... THUNDERSTORMS WERE MOVING INTO POLK COUNTY FROM THE WEST. REPORTS INDICATED VERY HEAVY RAIN WAS ACCOMPANYING THE STORM. ALSO HAIL UP TO MARBLE-SIZED HAS BEEN REPORTED NEAR DE SOTO IOWA...SOME 20 MILES WEST OF DES MOINES...HOWEVER MOST OF THE HAIL WAS PEA-SIZED. NO EXCESSIVE WINDS HAVE BEEN REPORTED WITH THIS STORM. THE STORM WAS MOVING 30 TO 35 MILES AN HOUR SHOULD BE THROUGH THE DES MOINES METRO AREA BY 700 AM CST. FORSTER
Special weather statement, Mar 10, 5:49 AM CST, 1 hour 56 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IA 545 AM CST SAT MAR 10 1990 AT 535 AM...ISOLATED STRONG THUNDERSTORMS WERE 5 TO 15 MILES NORTHWEST THROUGH SOUTHWEST OF DES MOINES. EXTREME RAINS AND HAIL...PEA TO MARBLE SIZE...WERE OCCURRING WITH THESE STORMS. THE STORMS WERE MOVING EAST AT 35 MILES AN HOUR AND SHOULD BE THROUGH THE METRO AREA BY 7 AM. ALSO...WIDELY SCATTERED SHOWERS AND STORMS EXTENDED FROM WES T CENTRAL INTO SOUTHEAST IOWA....SOUTH OF A LINE FROM SIOUX CITY THROUGH MARSHALL- TOWN TO OTTUMWA. MOVEMENT WAS NORTHEAST AT 35 MILES AN HOUR. KS
Special weather statement, Mar 10, 6:19 AM CST, 1 hour 26 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DES MOINES IA 615 AM CST SAT MAR 10 1990 STRONG THUNDERSTORMS CONTINUED OVER POLK COUNTY...NOW LOCATED EAST AND SOUTH OF THE DES MOINES INTERNATIONAL AIKRPORT. EXTREME RAINS...ONE-HALF INCH /.49/ FELL IN A 20 MINUTE PERIOD AND SMALL HAIL /PEA SIZE/ OCCURRED AT THE AIRPORT. THE STORMS WERE MOVING EAST AT 35 MILES AN HOUR AND SHOULD BE OUT OF THE METRO AREA BY 7 AM. KS
Local storm report, Mar 10, 7:33 AM CST, 12 minutes before
LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DES MOINES IA
735 AM CST SAT MAR 10 1990
...THE FOLLOWING ARE REPORTS FROM LAST NIGHT /MARCH 9TH/ AND EARLY
THIS MORNING...
TIME EVENT AND LOCATION
MARCH 9TH
1112 PM CST PEA SIZE HAIL AND POWER OUT DUE TO LIGHTNING AT SIGOURNEY
/KEOKUK COUNTY/
1127 PM CST 35 TO 40 MPH WINDS AT KEOTA /KEOKUK COUNTY/
MARCH 10TH
0520 CST 1/2 INCH DIAMETER HAIL AT DE SOTO /DALLAS COUNTY/
0555 TO 1/8 INCH DIAMETER HAIL AT THE DES MOINES AIRPORT
0558 CST /POLK COUNTY/
SCHUMACHERThe office that day
Everything else NWS Des Moines, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 9, 11:34 PM CST | Severe Thunderstorm Warning | DMX | Warren | 26 min |
| Mar 10, 12:04 AM CST | Severe Thunderstorm Warning | DMX | Warren | 26 min |
Nearby
Severe Thunderstorm Warnings in Iowa, 1990Every severe thunderstorm warning in 1990
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.